skeels



(NoModel.)

W; R. SKEBLS & W. H. MOORE.

Torsion Spring Tooth HaJroW. No. 235,578@ Patented Dec'. 14, l1880.

WITNESSES gy/TZSRS ATTORNEY" UNTTnn STATES PATENT @Trina WINES R.SKEELS, OF IVATERTOWN,AND WILLIAM H. MOORE, OF RODMAN, NEW YORK.

TORSlON-SPRING-TOOTH HARROW.

SPECIFICATION forming part of Letters Patent No. 235,578, dated December14, 1880. Application inea september as, leso. (No model.)

To all whom t may concern:

Be it known that we, WINESV It. SKEELs, of Watertown, J e'erson county,and WILLIAM H. MOORE, of Rodman, in the county of Jef ferson, both inthe State of New York, have invented a new and valuable Improvement inTorsion-Spring-Tooth Harrows; and we do hereby declare that thefollowing is a full, clear, and exact description of the construction 1oand operation of the same, reference being had to the annexed drawings,making a part of this specification, and to the letters and figures ofreference marked thereon.

Figure 1 of the drawings is a representation of a plan of the invention.Fig. 2 is a vertical longitudinal section. Fig. 3 is a perspectivedetail.

This invention relates to that class of devices known as harrows5 and itconsists in zo the details hereinafter specified.

In the drawings hereto annexed, A represents a harrow composed of twosections, B B', each section constructed like the other. These sectionsare composed of longitudinal 2 5 bars O C, supporting in hangers d" thetransverse teeth-bearing shafts D D D", the corresponding shafts in eachsection being united at their inner ends by the double couplings d d d,and said shafts being of such varying,

3o lengths from rear to front as to cause the sections B B to divergefrom each other. Upon each shaft, just within the bars C', there isfastened a loop, E, which extends more than half its length above theshaft, and at the tops has perforation e.

several shafts are connected by a rod or rods, F.

rlhe rear end of bar O is turned up and an eye, c, formed therein.Through this eye c there passes a hook, G, whose inner curved 4o end, g,takes into the holes e upon loop E, at-

tached to shaft D. Upon the lower side of this hook G there is a seriesof notches, g', to engage with the lower part of eye o, and a spring, g,upon the top of the hook holds the saidhook firmly against the eye. Bythis means the shafts can be rocked to give any desired pitch to theteeth.

Upon each shaft there is fastened a series of teeth, f j" f. rlheseteeth are constructed as follows: A flat curved tooth is provided at theupper end of the shank a with a shaft, b, forming a continuationthereof, and projecting at a right angle thereto. The end of the shaft bis ,made rectangular, and enters a recess in a clampingslide, a',encircling the 55 tooth-bar. The remaining portion of the shaft Z1 isround, and a sliding clamp, 75L, is slipped upon this portion of theshaft, and it, together with the clamp et', secures the tooth-shaftb tothe top of the tooth-bar, the clamp ctA holding the shaft firmly, whilethe clamp 7L permits it to turn therein, but not to move away from itsposition on the tooth-bar.

By this construction, as the teeth pass over the ground the resistanceproduces a torsional action in said teeth, and instead of pullingrigidly there is an elastic give.

One tooth on each shaft is rigidly affixed to the loop E, whereby it isattached to the shaft.

As before stated, the inner ends of the shafts D D D are attached by thedouple loops d d d. These loops are made of two U-shaped pieces, 7L',held at right angles by a swivelingpin, 71., primarily, but capable ofturning on said pin. One of these pieces is fastened to 75 a shaft onone section by a pin passing through an eye in said shaft, and the otherpiece fastened, in like manner, to the corresponding shaft on the othersection.

The inner ends of shafts D', between bars C C', are long enough toaccommodate a tooth, but not enough to take one with the body portionturned as shown on the inside of bars C O hence we arrange such bodyportion in the opposite direction.

NVe are aware that pivot tooth bars are not new in harrows; also, thatvarious means ot' securing this class of bars in the positions to whichthey may have been adjusted have been employed. Ve therefore make nobroad claim to either of these constructions, but desire to limitourselves to the construction herein shown and hereinafter claimed.Having thus described our invention, what we claim., and desire tosecure by Letters Patent, is v In a barrow, the curved spring-toothf,hav In testimony that We claim the above We 1o ing shank a and shaft bprojecting at a right have hereunto subscribed our names in the angletherefrom and made rectangular at its presence of two Witnesses. end asshown in combination with the tooth- 5 barD and the sliding clamp a',recessed to LS' secure the end of the shaft rmly to the bar, J L and theclamp h, to permit the sha-ft to turn Witnesses: therein to permittorsional action of the tooth, J B. LYON, as set forth. G. B. STRONG.

